Download Firefly 302 USB

Firefly 302 USB
Portable USB Audio Interface
IMPORTANT SAFETY INSTRUCTIONS
The apparatus shall not be exposed to dripping or splashing and that no objects
with liquids, such as vases,
shall be placed on the apparatus. The MAINS plug is used as the disconnect device, the disconnect device shall
remain readily operable.
Warning: the user shall not place this apparatus in the
can be easily accessible.
area during the operation so that the mains switch
1. Read these instructions before operating this
apparatus.
CAUTION
2. Keep these instructions for future reference.
RISK OF ELECTRIC SHOCK
DO NOT OPEN
3. Heed all warnings to ensure safe operation.
. Follow all instructions provided in this document.
5. Do not use this apparatus near water or in locations
where condensation may occur.
6. Clean only with dry cloth. Do not use aerosol or liquid
cleaners. Unplug this apparatus before cleaning.
7. Do not block any of the ventilation openings. Install
in accordance with the manufacturer’s instructions.
8. Do not install near any heat sources such as radiators,
heat registers, stoves, or other apparatus (including
.
9. Do not defeat the safety purpose of the polarized or
grounding-type plug. A polarized plug has two blades
with one wider than the other. A grounding type plug
has two blades and a third grounding prong. The wide
blade or the third prong is provided for your safety. If
the provided plug does not into your outlet, consult
an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or
pinched particularly at plug, convenience receptacles,
and the point where they exit from the apparatus.
11. Only use attachments/accessories
manufacturer.
by the
12. Use only with a cart, stand, tripod, bracket, or
table
by the manufacturer, or sold with
the apparatus. When a cart is used, use caution
when moving the cart/apparatus
combination to avoid injury from tipover.
13. Unplug this apparatus during lighting
storms or when unused for long
periods of time.
1. Refer all servicing to
service personnel.
Servicing is required when the apparatus has been
damaged in any way, such as power-supply cord or
plug is damaged, liquid has been spilled or objects
have fallen into the apparatus, the apparatus has
been exposed to rain or moisture, does not operate
normally, or has been dropped.
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER (OR BACK)
NO USER SERVICEABLE PARTS INSIDE
REFER SERVICING TO QUALIFIED PERSONNEL
The lightning flash with arrowhead symbol, within an
equilateral triangle, is intended to alert the user to the
presence of uninsulated “dangerous voltage” within the
product’
magnitude to constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature
accompanying the appliance.
WARNING: To reduce the risk of
or electric shock, do
not expose this apparatus to rain or moisture.
CAUTION: Use of controls or adjustments or performance
of procedures other than those
hazardous radiation exposure.
may result in
Firefly 302 USB
Portable USB Audio Interface
INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
FEATURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
QUICK START ..................................................................................................5
FRONT PANEL DESCRIPTION....................................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
REAR PANEL DESCRIPTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
USB 2.0 INTERFACE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
DRIVER INSTALLATION ...................................................................................9
CHANNEL ASSIGNMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 5
OPERATING WITH DAW SOFTWARE....................................................................... 15
PC OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 6
MAC OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 9
APPLICATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 4
DIMENSIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 5
BLOCK DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 5
Phonic preserves the right to improve or alter any information within this document without prior notice.
V1.0 NOV 7th, 2008
Introduction
Features
Congratulations on your purchase of one
of the newest members of the Phonic
Firefly series of recording interfaces, the
Firefly 302 USB. Through the Firefly’s
ultra low-noise microphone input and
two line inputs, together with the USB
2.0 interface, users are able to digitally
transfer their audio to a computer in high
resolution audio that meets today’s modern production standards (24-bit, with a
sampling rate selectable up to 192 kHz).
Never again will you have to worry about
loss of audio, as the Firefly is the only
tool you need to transfer those analog
recordings to digital.
● 5 x 6 24-bit/192kHz USB stream
Light, easy to use, and with no problematic configuration necessary, the Firefly
certainly shines when it comes to simplicity and mobility.
I/O
● 2 x 2 analog operation (RCA)
● Front-panel microphone in (XLR)
with +48V phantom power
● Headphone output with dedicated
level control
● Near-z ero latency ASIO software
direct monitoring
● Power indicator LED
● DC power supply included
● Easy-to-see signal and clip LED
indicators for input and output
● Mac OSX and Windows XP / Vista
compatible
We know how eager you are to get
started – wanting to get the product out
of the box and hook it all up is probably
your number one priority right now – but
before you do, we strongly urge you to
take a look through this manual. Inside,
you will find important facts on the set up,
use and applications of your brand new
Firefly. If you do happen to be one of the
many people who flatly refuse to read
user manuals, then we just urge you to
at least glance at the Instant Setup section. After glancing at or reading through
the manual (we applaud you if you do
read the entire manual), please store
it in a place that is easy for you to find,
because chances are there’s something
you missed the first time around.
Firefly 302 USB
Installation
Quick Start
1. Turn your computer on and connect
the Firefly 302 USB to the computer
via the included USB cable. It is
recommended not to turn the unit’s
power on just yet, however.
1. Connect the DC converter to the 912V jack in and change the power
selector switch to the DC IN position.
2. Run the setup.exe file on the included
driver CD, and follow the installation
instructions displayed on screen.
3. When prompted to “disconnect and
reconnect” the Firefly, change the
power select switch on the rear of
the device to DC IN.
4. Continue to follow the on-screen
installation instructions to finalize the
setup.
5. Open your audio editing / DAW software, and check the Firefly’s ASIO
driver has been read successfully
by the program. This is usually done
in the “Devices” submenu. You may
also want to edit the Firefly’s properties. This is usually done by clicking
on the Tools pull down menu, and
selecting “Properties”. In this area,
you can usually select the Firefly’s different inputs and outputs, and assign
them to various channels. This, of
course, depends on the software you
are using, so check the software’s
user’s manual for more information.
Firefly 302 USB
2. Plug your USB cable into Firefly’s
USB port and the other end into any
available USB port on your computer.
Provided you have already installed
the required driver, the computer
should detect your Firefly 302 USB.
3. Connect a microphone to the XLR
input connector. Talk into the mic and
check the LED sig and clip indicators.
Adjust the Mic level control as you
see necessary.
4. Connect any analog line inputs you
wish to use. We advise that you do
not attempt to use the 1/4” and RCA
connectors on any one input channel
at the same time.
5. Open your audio software and configure it so the Firefly 302 USB is set as
your input/output device. Please note
that the analog and S/PDIF outputs
cannot be used to output the signal
from the computer simultaneously.
6. Plug your headphones into the headphone output of the Firefly to monitor
the return signal.
7. Now you are ready to design high
resolution audio productions.
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Front Panel Description
1. Power LED Indicator
5. Gain 1 and 2
When you connect the DC power converter
and change the power switch to the DC IN
position, the unit will be powered and the
front power LED will be illuminated.
All the audio signals that are mixed on
computer can be monitored with the Headphone output. You can also control the
level of this signal with the corresponding
level control.
These knobs control the input gain for the
RCA and 1/4” plug input jacks located on
the rear panel. Turn them clockwise to
increase the signal level gain or turn them
counterclockwise to lower the input levels.
Gain 1 controls the Analog In 1 RCA and
1/4” TRS input jacks, and Gain 2 controls
the Analog In 2 RCA and 1/4” TRS input
jacks. Each gain control is independent
of the other, so you can easily match your
input levels.
3. XLR Microphone Connector
6. +48V Phantom Power
2. Headphone Output Jack and Control
This is a balanced microphone XLR 3-pin
connector, which you can use to connect
dynamic or condenser microphones.
Phantom power may be applied to allow
condenser or ribbon microphones to be
connected.
4. Mic Gain
Turn this knob clockwise to increase the
Microphone input’s gain. You have 44dB
of possible gain with this knob, so please
take care when applying gain to ensure the
Mic Clip LED does not light up.
Pushing this button will activate +48V of
phantom power on the microphone input,
allowing users to connect condenser microphones, ribbon microphones, or other
input devices that require +48V power to
operate. If you are not entirely sure if your
mic requires phantom power, please refer
to the microphone’s operation manual or
consult the manufacturer.
7. Signal / Clip Indicators
These LED indicators give users an idea of
when their analog and mic inputs and outputs are receiving a signal (sig) and when
that signal reaches high peaks just prior
to the signal being dynamically clipped,
which may cause undesirable effects to
the integrity of your audio (clip).
Firefly 302 USB
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Rear Panel Description
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8. Analog 1/4” TRS Inputs 1 and 2
11. Analog RCA Outputs 1 and 2
These are balanced 1/4” TRS Line Inputs
and can be used to connect any line level
devices, such as CD players or DAT recorders.
These are RCA line outputs. They accept
RCA cables and can be connected to any
external device that uses RCA connectors.
This could include tape recorders and MP3
recorders.
9. Analog RCA Inputs 1 and 2
These are RCA inputs and can be used to
connect any device like CD players, DAT
recorders, turntables, and even analog
mixers (taking the signal from a mixer’s
Record or 2 track outputs).
Important Note: Keep in mind that the two RCA
inputs are completely independent of one another; however these inputs should not be used if
the corresponding 1/4” analog 1 and 2 inputs are
used, as doing so would have quite undesirable
results. You can, however, mix and match these
inputs. If, for example, you wanted to use Input
1’s RCA connector and Input 2’s 1/4” connector
that would not cause any problems.
10. Analog 1/4” TRS Outputs 1 and 2
This are balanced 1/4” TRS Line Outputs
with line level signal (+4dBu). Use them to
get a stereo output channel and connect
them to active monitors (such as the Phonic P8A), or perhaps to an amplifier and a
passive pair of speakers. You could also
use them with signal processors, mixers
or other external devices.
Firefly 302 USB
12. S/PDIF In/Out
These are a standard S/PDIF Digital Audio
Input/Outputs that can be use with digital
mixers, DAT recorders, or any external
device that uses this Digital format. The
S/PDIF’s output sampling rate is determined by the sampling rate set by the
Firefly control software. Please use a 75
ohm coaxial cable with RCA plug if you are
using the S/PDIF connection, as the most
common problems associated with glitches
in digital interfaces are the result of using
poor quality cables.
13. MIDI In/Out
You can have 16 simultaneous MIDI input/output channels sent to and from your
computer through the Firefly 302 USB.
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14. USB Port
This is a digital USB 2.0 connector that
you can use to connect to your computer.
Doing so allows users to send their audio
signal from the Firefly to the computer, and
vise-versa.
15. 9-12VDC Input Power Jack
Connect the supplied DC converter to this
jack to feed the unit. Please only use this
DC converter in order to ensure no damage
is done to the Firefly. If for any reason your
converter gets lost or damaged and you
need a replacement, please contact your
local Phonic dealer.
16. Power Switch
Use this switch to turn the Firefly 302 USB
on and off.
Firefly 302 USB
USB Interface
System Requirements
The following are the minimum required specifications for use with the Firefly 302 USB.
If your computer does not meet these requirements, you will experience lagging of audio and possible freezing of your computer when attempting to operate the Firefly.
Windows
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Microsoft® Windows® XP (with SP2) or Microsoft® Windows® Vista
Available USB 2.0 port
Intel Pentium® 4 processor or equivalent AMD Athlon processor
Motherboard with Intel or VIA chipset
5400 RPM or faster hard disk drive (7200 RPM or faster with 8 MB cache recommended)
• 256 MB or more of RAM (512 MB recommended)
Macintosh
• OS X Leopard 10.5.1 or later with USB support
• Intel Core 2 Duo or later processor (G4 processors are not supported)
• 256 MB or more of RAM (512 MB or more recommended)
Driver Installation
To use the Firefly efficiently (or at all) on any computer, it is important to install all the
necessary drivers from the included CD. We advise that users read all instructions
carefully before continuing on to each step of the installation process, as they will be
asked to, howev disconnect and reconnect their Firefly.
Windows XP (with Service Pack 1 or 2)
1. It is recommended that you quit all applications before starting the installation process.
2. Connect the Firefly 302 USB to the computer, leaving the power of the unit off.
3. Insert the installation CD included with your Firefly into the CD-ROM drive of your
computer. If the CD does not automatically start the installation process within a
few moments, then navigate to “My Computer” → y our CD-ROM drive → “Firefly302USB_Driver” → d
 ouble-click “setup.exe” to begin the installation manually. The
Firefly Control Panel software also will be installed at this time.
4. Follow the on-screen installation instructions, turning the Firefly on when asked to
‘disconnect and reconnect’ the unit.
Firefly 302 USB
Make sure no other programs are running on your PC and click “Next”.
Read and accept the terms of the License Agreement and click “Next” to continue.
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Firefly 302 USB
Either select a new destination for the installation,
or else click “Install” to accept the default directory.
The installation will then commence.
Firefly 302 USB
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Connect the Firefly 302 USB to the computer and push ‘Finish’ to complete the installation.
If a message is displayed indicating that the software has not passed
Windows Logo test, click “Continue Anyway.”
After installation is complete, an installation complete message
will appear on screen. Click ‘Finish’ to exit.
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Firefly 302 USB
Mac OSX Driver Installation
1. It is recommended that you quit all applications before starting the installation process.
2. Do not connect the Firefly 302 USB to the Mac until after you have installed the driver.
3. Insert the installation disc into the CD drive of your computer. If the CD does not automatically start the installation process, navigate to y our CD drive → “Phonic” → “Firefly302USB” → then run “PHONIC_FireflyUSB.mpkg” to begin the installation manually. The
Firefly Control Panel software also will be installed at this time.
4. Follow the on-screen installation instructions.
5. After installing the Mac driver, connect the Firefly 302 USB to the Mac’s USB port.
Select “Change Install Location...” to select a new destination for the Mac software.
If not, the software will automatically be installed to the default location.
Firefly 302 USB
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Click ‘Close’ once the installation has completed.
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Firefly 302 USB
Channel Assignment
Operating With DAW Software
When using a Digital Audio Workstation
on a PC, and within the included Phonic
Firefly 302 USB control panel software,
the following names have been attributed
to the input channels of the Firefly.
After successfully completing the installation process, the following process must
be followed to work efficiently with the
Firefly 302 USB. In the following example, we are using Cubase - however most
other software should be similar.
Channel Name
Firefly Channel
Analog In 1
1/4” and RCA Analog Input 1
Analog In 2
1/4” and RCA Analog Input 2
Mic In
Microphone Input
Mic In
Microphone Input
S/PDIF In
S/PDIF Input
S/PDIF In
S/PDIF Input
Midi In
MIDI Input
If you would like to use the Firefly 302
USB as your default audio output device
on your PC, simply go into the Windows
control panel and select “Sound and Audio Devices.” Select the Audio tab, and
use the pull-down menu to select one of
the Firefly 302 USB’s inputs from the list of
available output devices. The Firefly 302
USB can also be selected as the default
output device for individual programs by
editing said programs’ settings / options.
1. Open the program.
2. Go to the ‘Devices’ pull-down menu and
select ‘Device Setup’. On the left, select
‘VST Multitrack’.
3. From the ASIO Driver drop-down list select the ‘Firefly302USB ASIO Driver’. A
pop-up box will ask you if you want to
switch to the ASIO driver. Click ‘Switch’.
This completes the basic setup.
4. The following steps should be followed
to activate audio tracks received from or
sent by the Firefly 302 USB.
a. Go to the “devices” pull-down menu
and select ‘VST Inputs’. This will display the various inputs (“Analog In 1”,
“Analog In 2”, etc.)
b. Activate channels by clicking the “Active” button located next to each channel name.
5. For further instructions on the operation
of Cubase, please consult the owner’s
manual by pressing F1 while the program is open.
If you wish to reset the Firefly ASIO driver,
simply go to the ‘devices’ pull-down menu
and select ‘device setup’. Simply click ‘reset’
and select the ‘Firefly302USB ASIO Driver’.
Click ‘ok’ to continue and the Firefly 302 USB
should once again become functional.
Firefly 302 USB
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Windows Operation
The Firefly control panel on the PC can be
accessed at any time by entering choosing
the shortcut from your Programs menu.
This program will not only allow users to
alter their device and channel names and
properties, but will also let them adjust
buffer settings, change sampling rates,
and so forth.
Buffer Settings
The Buffer Settings menu is used to adjust the Streaming Buffer, as well as the
buffer settings when using the ASIO and
WDM drivers.
Sample Rate
In this menu, users are able to adjust the
sampling rate of the Firefly 302 USB. The
sampling rate can be chosen between
44.1, 48, 88.2, 96, 176.4 and 192 kHz.
Press ‘apply’ once a new sampling rate is
selected.
The ‘Streaming Buffer’ can be adjusted
between Minimum (1 millisecond), Small
(2 milliseconds), Large (4 milliseconds)
and Maximum (8 milliseconds). The selection of the Streaming Buffer size will
determine the size of the ASIO and WDM
buffer sizes, as displayed in the table at
the bottom of this page.
When selecting a new buffer size, users
can click ‘Apply’ to apply the newly selected buffer setting to the device.
ASIO / WDM Buffer Setting
Streaming Buffer Setting
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Minimum (1 ms)
Small (2 ms)
Large (4 ms)
Maximum (8 ms)
Minimum
1.5 ms
66 samples
3.0 ms
132 samples
6.0 ms
256 samples
12.0 ms
529 samples
Small/Smaller
2.0 ms
88 samples
4.0 ms
176 samples
8.0 ms
353 samples
16.0 ms
706 samples
Large/Small
3.0 ms
132 samples
6.0 ms
256 samples
12.0 ms
529 samples
24.0 ms
1058 samples
Maximum/Standard
4.0 ms
176 samples
8.0 ms
353 samples
16.0 ms
706 samples
32.0 ms
529 samples
Firefly 302 USB
Devices / Device0
In the Devices section, users are able
to view and edit the name of any Phonic
USB Devices connected to the computer.
The Device0 menu offers device info as
well as a S/PDIF pass through function for
users to take advantage of. There is also
two driver-integrated mixers that users
are able to utilize to better customize their
input/output levels to suit their computer.
Software Inputs Mixer
Hardware Inputs Mixer
This software-based mixer allows users
to adjust levels and routing options of all
input signals of the Firefly 302 USB. All
of the outputs from this mixer can then be
utilized by DAW and other suitable applications.
This mixer allows users to monitor and adjust the levels (and routing) of the output
signals from the PC. Like the Hardware
Inputs Mixer, users are able to adjust
volume levels and mute output tracks as
necessary. Also like the Hardware mixer,
level meters are provided on the software
mixer’s inputs and outputs.
Level meters are incorporated into the
mixing software. Users are given visual
depictions of current incoming and outgoing signals from this software mixer.
Firefly 302 USB
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Input Channels
The Input Channels section allows users
to view and edit the name of the various
input channels received from the USB input. Please note that the channel names
used in the picture below may differ from
your unit’s.
Driver Information
This section allows users to check the
version of their currently used driver and
the interface. New drivers will be made
available from time to time on the Phonic
document center, and an announcement
will usually be made on the Phonic home
page.
Output Channels
By entering the Output Channels section,
users can view and edit the names of the
two analog output channels and two S/
PDIF output channels that are sent from
the computer to the Firefly.
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Firefly 302 USB
Mac Operation
After installing the Firefly 302 USB driver
and software to your Mac computer, enter
the Audio MIDI Setup application and you
should be able to select the Phonic Firefly
302 USB as your default input and output
device.
channels 1 and 2), the microphone input
(channels 3 and 4) and the S/PDIF left
and right input signals (channels 5 and 6).
The output channels 1 to 4 are, in order,
analog outputs 1 and 2 and S/PDIF outputs left and right.
MIDI Setup
Also in the Audio MIDI Setup section, users are able to adjust the Firefly’s MIDI
functions by selecting ‘MIDI Devices’ at
the top of the window. Within the MIDI
Devices section, a ‘Firefly 302 USB’ icon
should be present and users can select it
to get the following screen.
Also in the Audio MIDI Setup, you will be
able to adjust volume levels of your various input and output signals, as well as
the sampling rate and resolution you want
to use. Users are able to select between
44.1, 48, 88.2, 96, 176.4 and 192 kHz
sampling rates. Resolution can be selected between 24-bit, 20-bit and 16-bit.
Both the sampling rate and resolution can
be adjusted in your DAW software as well
(depending on what software you use).
Also in the Audio MIDI Setup, tracks can
be muted at will, and input signals can be
set to ‘thru’, which - put simply - will return
the input signals directly back to their corresponding outputs.
The input and output channel names listed
correspond with each of the Firefly’s input
and outputs. Channels 1 to 6 on the input
correspond, in order, with analog inputs 1
and 2 (listed in the Audio MIDI Setup as
Firefly 302 USB
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Firefly 302 USB Control Panel
As many of the Firefly’s features are adjustable through the Audio MIDI Setup
section, the Firefly302USB Control Panel
serves a few very specific surfaces. As
seen in the image below, the main page
of the software allows users to view a few
important details on the product, including
the driver version, serial number, etcetera.
Users can also select one of the two internal mixers that the Firefly’s software
offers.
Monitor Mixer
The Monitor Mixer, in essence, allows you
to adjust your Firefly’s input signals before
sending them off to your DAW software.
All of the inputs are listed; the SPDIF 1
and 0 inputs that are listed in the software
are representative of the S/PDIF left and
right input signals, I2S 3 and 2 are both
the microphone input, and the I2S 1 and 0
channels are analog inputs 1 and 2 on the
Firefly 302 USB.
In case you’re wondering why there’s only
one microphone input, but two microphone channels on the Firefly - this function allows you to make a stereo mix of
your microphone signal!
Playback Mixer
The control panel software also offers
a Playback Mixer. This is the ‘software
mixer’, allowing users to adjust the signal
they send out to the Firefly 302 USB’s outputs. All of the output signals from your
DAW software can be adjusted individually before being sent out their respective
outputs on the Firefly.
You can opt to adjust your device’s input
signals in this mixer, or you can just opt to
leave it alone all together and rely on your
DAW software’s level controls.
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Firefly 302 USB
As with the Monitor Mixer, each of the
listed output channels is representative
of one of the Firefly’s output channels.
Channels 1 and 2 are analog outputs 1
and 2, while 3 and 4 are the left and right
S/PDIF outputs.
S/PDIF Pass Through
Also included on the Firefly 302 USB
Control Panel is the SPDIF Pass Through
function. This basically allows you to send
your S/PDIF input signals directly out
through from the computer to the Firefly’s
S/PDIF outputs.
Firefly 302 USB
21
Application
Turning Analog Recordings Digital
Audio Cassette Player
or LP Player
LAPTOP COMPUTER
HEADPHONE
22
Firefly 302 USB
Mobile Studio Recording
ACTIVE
MONITORS
HDM1.8
HDM1.8
GUITAR
GUITAR EFFECTS
KEYBOARD
DRUM MACHINE
HEADPHONE
Firefly 302 USB
LAPTOP COMPUTER
MICROPHONE
23
Specifications
Line Inputs
Connectors
1/4” TRS, RCA
Max input (balanced)
+10 dBu
Max input (unbalanced)
+10 dBu
Input gain range
-∞ to +10 dBu
Impedance
10K Ohm (Unbalanced), 20K Ohm (Balanced).
Microphone Input
Connectors
XLR
Available gain
44dB
Input range:
-40 ~ -+4 dBu
Impedance
2k ohm
Line Outputs
Connectors
1/4” TRS, RCA
Max output (balanced)
+8 dBu
Max output (unbalanced)
+2 dBu
Impedance
100 Ohm (Unbalanced), 200 Ohm (Balanced)
System
Signal-to-noise ratio
-97 dB @ 48 kHz (A-WEIGHTING)
THD + N
0.002% 1 kHz, @ 48 kHz
Frequency response
20 Hz to 20 kHz @ 48 kHz,+0.03/-0.23 dB
Crosstalk
-81 dB (A-WEIGHTING)
S/PDIF Input and Output
Connector
Coaxial RCA
Sample rates
44.1, 48, 88.2, 96, 176.4, 192 kHz
Headphone Outputs
Max output
+2 dBV (1.3Vrms) into 32 ohms
Physical Attributes and Power
Power supply
24
DC 9 ~12V (AC to DC adaptor)
Dimensions (W x D x H)
196 x 130 x 44 mm / 7.7” x 5.1” x 1.7”
Weight
0.9 kg / 1.98 lbs
Firefly 302 USB
Dimensions
196 / 7.7
155 / 6.1
155 / 6.1
51 / 2
measurements are shown in mm/inches
Firefly 302 USB
25
MIC
DC IN +12V
LINE 2
LINE 1
PHANTOM POWER
+48V
2
26
3
POWER SW.
POWER
1
+48V
+12V
-30
0
GAIN
-30
0
GAIN
GAIN
-60
-38
Digital Signal Prosessor
0
-30
0
-30
PHONES
S/PDIF OUT
S/PDIF IN
MIDI OUT
MIDI IN
USB2.0
OUT2
OUT1
PHONES OUT
Block Diagram
Firefly 302 USB
6103 Johns Road #7